package collection;


import java.util.ArrayList;
import java.util.HashMap;
import java.util.concurrent.ConcurrentHashMap;

/**
 * @author mubei
 * @date 2021/11/28
 * @description
 */
public class Test0 {

    public static void main(String[] args) {
        ConcurrentHashMap<String, String> map = new ConcurrentHashMap<>();


    }
}
